Fix initialization order issue with Geo database

This caused the wrong Sidekiq pool size value for Geo secondaries.

config/initializers/database_config.rb

@@ -10,6 +10,16 @@ def log_pool_size(db, previous_pool_size, current_pool_size)
   Gitlab::AppLogger.debug(log_message.join(' '))
 end
 
+Gitlab.ee do
+  # We need to initialize the Geo database before
+  # setting the Geo DB connection pool size.
+  if File.exist?(Rails.root.join('config/database_geo.yml'))
+    Rails.application.configure do
+      config.geo_database = config_for(:database_geo)
+    end
+  end
+end
+
 # When running on multi-threaded runtimes like Puma or Sidekiq,
 # set the number of threads per process as the minimum DB connection pool size.
 # This is to avoid connectivity issues as was documented here:

config/initializers/geo.rb

 # frozen_string_literal: true
 
 Gitlab.ee do
-  if File.exist?(Rails.root.join('config/database_geo.yml'))
-    Rails.application.configure do
-      config.geo_database = config_for(:database_geo)
-    end
-  end
-
-  begin
-    if Gitlab::Geo.connected? && Gitlab::Geo.primary?
-      Gitlab::Geo.current_node&.update_clone_url!
-    end
-  rescue => e
-    warn "WARNING: Unable to check/update clone_url_prefix for Geo: #{e}"
+  if Gitlab::Geo.connected? && Gitlab::Geo.primary?
+    Gitlab::Geo.current_node&.update_clone_url!
   end
+rescue => e
+  warn "WARNING: Unable to check/update clone_url_prefix for Geo: #{e}"
 end

ee/changelogs/unreleased/199672-geo-initialization-order-issue-with-geo-database.yml

+---
+title: Fix DB connection pool size for Geo database
+merge_request: 24021
+author:
+type: fixed